Bgification



(No Model.)

W. SCHMIDT.

STEAM ENGINE.

No. 348,144. Patented Aug. 24, 1886.

FNITED STATES 'iPA'rnnr Orrrcn.

XVILHELM SCHMIDT, .OF BRUNSVICK, GERMANY.

STEA M -.E;N G l NE.

ELJBCIFICATION formiug part Qf'Letters Patent No. 348,144, dated August 24, 1886.

Application filed April 7, 1885. Renewed August 2, 1886. Serial No. 208,794. (No model.) Patented in England March 13, 1885, No. 3,307; in France March 13, 1885, No. 167,618; in Belgium March 14, 1885, No. 68,188, and in Germany June 4, 1885, No. 33,653.

invented a new and useful Improvement in Steam Engines, (for which I have obtained patents in England March 13, 1885, No. 3,307 in France March 13,1885,No. 167 ,618; in Belgium March 14, 1885, No. 68,188; in Germany June 4, 1885, No. 33,653,) of which the following is a specification.

In my suction-blast steam-engine high-pressure steam is employed, which, on its way to the engine, acts repeatedly like an injectorblast on gases of lower pressure, absorbs and compresses them, and the mixture ofthe gases then comes into action in the cylinder of the engine.

The advantages of the present method are the following: In the steam-generator butlittle water or steam is used, since a great number of dynamical units are added by high pressure to the steam developed; this pressure is gradually lessened by the injector apparatus and by mixing with low-pressure gas, so as to obtain a state of tension suitable for use; the gas (which term in this specification includes vapor) is increased in volume,.and at the same time superheated, and thus a large volume of gas is obtained-with a small consumption of water or steam in the boiler.

The accompanying drawing illustrates a steam-engine embodying my invention.

The suction blast apparatus g acts by the momentum of the high-pressure steam leaving the tube 1', sucks up the gas from the tube 0', and thus operates the compression and partial superheating of the absorbed gas without any condensation of the high-pressure gas taking place-in fact, it only acts by-its momentum. A loss of kinetic energy takes place in each steam-injector,the energy thus absorbed being transformed into heat,which is communicated to the gaseous mixture, and superheating is the result.

The drawing shows the application of this improvement to a compound engine.

A is the small cylinder,the two ends of which work with different grades of expansion; ]3,thc large cylinder. 0 O- is the intermediate receiver or exhaust-chamber, divided into two parts, corresponding to the two ends of the of the steam is arrived at by two sets of injectors or steam-nozzles.

The high-pressure steam issuing from the tube r absorbs in the injector apparatus g the steam of lowerpressure from the part 0 of the receiver, and inthe steam-injector apparatus it compresses and super-heats the steam from the upper part, 0, of the receiver or exhaust chamber, pressing it into the receiver or mixing-chamber D,from which it reaches the small cylinder. When the steam in the small cylinder is spent, it enters the receiver 0 O,where it partly returns into the suction current or cycle,while another part is utilized in the large cylinder 13. Of course, the steam issuing from B can be condensed in the injector apparatus and again brought into circulation.

The arrangement of the suction-blast apparatus can of course be applied to machines having one or three cylinders. In engines having only one receiver the blast is first caused to suck atmospheric air and subsequently steam from the receiver,which has a higher pressure than the atmosphere. The repeated action of the blast is therefore also practicable with a single receiver.

As compared with similar inventions for the same purpose, my method presents the essential feature that the kinetic energy of the high pressure blast is first employed to suck a gas at low pressure, and subsequently-that is, after its mixture with a portion of the lowpressure gasto suck a gas having a pressure intermediate between that of the low-pressure gas and that of the gas-mixture produced bythe first suction.

What I claim is 1. The method of utilizing the momentum or kinetic energy of gases flowing out of a vessel by means of a suction-blast apparatus,which consists in first causing the high-pressure blast to suck a gas of lower pressure, and then causing the current resulting from the operation to act as a suction-blast upon gases of a pressure higher than that of the gases sucked by the first blast, thus applying the kinetic energy of the first blast for compressing and superheating gases of successively higher pressure, while the speed of the firstblast is gradually reduced.

2. The method of producing a circulation and utilization of steam in compound or multicylinder-engines having several receivers of different'steam-pressures,which consists in cansing a blast of high-pressure gas to act successively upon thesaid receivers in such a manner that the blast first sucks steam from the receiver having the lowest pressure, and that the mixed current thus formed sucks steam from thereceiverhaving a higher pressure than the first receiver; that the mixed current formed by this operation then acts as asuctionblast upon the receiver having a higher pressure than the second; that the last suction-blast of the series draws steam from the receiver having the highest pressure,and that the steammixture thus obtained is employed to drive the engine.

3. The method of producing a circulation and utilization of steam in steam engines, which consists in first causing a blast of high-pressure gas to suck atmospheric air, then causing the current resulting from the operation to act as a suction-blast on the steam contained in the receiver, and then allowing the gaseous mixture obtained by the second suction to perform work in the engine in the usual manner.

4. The method of prod ucinga circulation and utilization of steam in compound engines having several receivers of ditferent steam-pressures, which consists in first causing a blast of high-pressure gas to suck atmospheric air,thcn causing the current resulting from the operation to suck steam from the receiver having the lowest pressure, (but higher than the atmosphere,) forming a suction blast from the mixed-gas current thus produced, causing this blast to suck steam from the receiver having a higher pressure, and allowing the mixture produced by the third suction to perform work in the engine,

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

VILHELM SCHMIDT.

Witnesses:

ROBERT DEIPLER, B. R01. 

